One clear difference between Hillary and Bernie (and O’Malley) was their respective position on the repeal of Glass Steagall, the New Deal law that required a separation between commercial banking and investment banking. Bill Clinton repealed it in 1999. Sanders and O’Malley (and Elizabeth Warren for what that’s worth) want Glass Steagall re-instituted. Hillary opposes re-institution. Wall Street also opposes re-institution. Guess which candidate is hauling in the Wall Street cash?

Krugman does acknowledge that the repeal of Glass Steagall was a mistake. Implicitly, that’s a concession it should be restored.

Which means that the real difference here lies in Sanders’ and Clinton’s respective views regarding Glass Steagall, Clinton’s carefully scripted debate answer notwithstanding. And the difference is as clear as it is significant.